Proton Calorimetry/Meetings/2017/12/13

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Minutes for UCL Proton Calorimetry Meeting, 6th December 2017 (D17, Physics & Astronomy, UCL)


Simon Jolly, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman, Dan Walker

Matthieu Hentz:

  • Refining Clatterbridge simulations:
    • Noticed that particles were getting through a gap between the dosimetry box and the nozzle: due to Geant having difficulties with coinciding boundaries.
    • Fixed by putting a brass ring around the nozzle on the outside of the box.
  • Completing coursework and reading up on proton CT.


  • Fixed smearing of energy resolution in simulations:
    • Was smearing pre and post simulations: post-simulation always used 8.5%; now only smearing pre-simulation with variable resolution.
    • Now correlation between Monte Carlo truth and reconstructed energy spectrum.
    • Still seeing low energy tail.


  • PPRIG was good!
    • Mike Merchant wants particle spectra for Geant4-DNA simulations.
    • Very helpful comments during evening meal...
    • Not sure whether initial proton retains 'primary proton' ID.
  • Everything should be finished with paper:
    • Waiting for Adam to write his parts and polish off.
    • Clinical part needed from Richard Amos.
    • No answer from Tracey Underwood: becoming less likely...
  • Lots of code housekeeping!
  • Will contact Michaela Esposito and Tony Price about ISDI sensors.


  • Gone back to looking into CAD modelling in Geant4.
  • Going through Matthieu's Clatterbridge simulations:
    • Learning how simulations run.
    • Investigating introducing sensitive detectors for particle measurements.


  • Improved code to integrate waveforms.
  • Reconstructed Caen ADC spectrum: needs corresponding LeCroy binary files.
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